Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Threads
Graduate Interior Schwarzschild Metric: Pressure Dependence
- Sonderval
- · Replies 6 ·
High School Another question about Gravity -- Does the apple attract the Earth?
- TheQuestionGuy14
- · Replies 33 ·
High School How exactly does gravity work?
- TheNerdyBushman
- · Replies 81 ·
Undergrad Understanding Special & General Relativity: Inertial vs. Gravitational Frames
- nomadreid
- · Replies 15 ·
Undergrad Black Holes and Charged Particles
- DuckAmuck
- · Replies 38 ·
Graduate Gravitational Waves: Verification Accuracy & Physicists' Opinions
- arupel
- · Replies 1 ·
High School Hockey Puck Paradox: Will Antman Fly or Cruise?
- Grinkle
- · Replies 26 ·
Undergrad Confused About Lorentz Generators
- nigelscott
- · Replies 3 ·
High School Increase in PE due to increased mass
- Altair Tans
- · Replies 23 ·
High School Einstein's curvature vs. Newton's
- Peter Martin
- · Replies 22 ·
Undergrad Relativistic Calculus Books & PDFs | Free Resources
- Somali_Physicist
- · Replies 11 ·
Graduate Why is Killing vector field normal to Killing horizon?
- JunhoPhysics
- · Replies 19 ·
High School I cannot grasp simultaneity in Special Relativity
- Hypercube
- · Replies 9 ·
Undergrad Do Black Holes Have Walls That Define Their Structure?
- Gondur
- · Replies 5 ·
Graduate Strange Tetrad Form of Einstein-Hilbert Action
- bolbteppa
- · Replies 2 ·
Undergrad How much time dilation is there within a contracting remnant
- DC0
- · Replies 21 ·
Undergrad Can a Gravitational 'Gun' Accelerate Objects?
- LAP3141
- · Replies 10 ·
High School Addition of velocities at speeds near C - any differences?
- Alex Pavel
- · Replies 34 ·
High School Gravitational Wave Communication System
- alan123hk
- · Replies 3 ·
High School Speed of Light & Time Dilation: Travel Distance in 1 Sec?
- Jose Estrada
- · Replies 2 ·
Undergrad Pseudotensors in different dimensions
- illuminates
- · Replies 15 ·
Undergrad Vectors in Minkowski Space & Parity: Checking the Effect
- illuminates
- · Replies 4 ·
Graduate Is There a Proper Way to Define Energy in General Relativity?
- bhobba
- · Replies 5 ·
Undergrad Relativistic Particles: Reaching Absolute Temperature?
- Somali_Physicist
- · Replies 8 ·
Undergrad What Makes Ohanian's Approach to General Relativity Unique?
- bhobba
- · Replies 18 ·
High School SR & GR: Circular Relationship?
- John Anthony
- · Replies 8 ·
Graduate Variation of Scalar Field Action: Polchinski's AdS/CFT Review
- craigthone
- · Replies 2 ·
Undergrad Curvature and Schwarzschild metric
- vibhuav
- · Replies 11 ·
Undergrad Energy-momentum formula and deBroglie wavelength
- sha1000
- · Replies 4 ·
Undergrad Measuring Speed of Light Relative to Earth
- Chris84567
- · Replies 8 ·
High School Question about Gravity according to GR: Earth Rises, Time Axis Curves
- TheQuestionGuy14
- · Replies 3 ·
Undergrad Center of Mass Motion: Velocity & Momentum
- Hiero
- · Replies 4 ·
Undergrad Flash open manhole cover paradox
- Alan McIntire
- · Replies 28 ·
Undergrad If a rock fell 20,000 meters to Earth Question
- Jack981
- · Replies 7 ·
Undergrad Why Is a Violation of Causality a Problem?
- Keln
- · Replies 5 ·
High School Faster than Light and wormholes
- Richie Smash
- · Replies 17 ·
Graduate Is There a Relativistic Version of Hooke's Law for Materials?
- Dale
- · Replies 8 ·
Undergrad Confirming Covariant Derivative in Hartle's Gravity
- PeroK
- · Replies 10 ·
Undergrad Separating Overlapping Event Horizons: Theory
- anubodh
- · Replies 3 ·
Undergrad Length Contraction & Mass Increase in GR | General Relativity
- Ranku
- · Replies 14 ·
High School Energy and Matter: General Relativity Explained
- Spar
- · Replies 3 ·
Undergrad Can a Geometric Animation Help Visualize the Special Theory of Relativity?
- stickman76
- · Replies 5 ·
Graduate Difference Between Covariance and Diffeomorphism Invarience
- bhobba
- · Replies 11 ·
Undergrad 4-momentum of a massless particle
- pellman
- · Replies 3 ·
Undergrad How to fill the stress energy tensor for multi body systems
- BiGyElLoWhAt
- · Replies 29 ·
Undergrad Proving Effects of Stress-Energy Tensor on Curvature
- VladZH
- · Replies 5 ·
High School Special relativity equation question
- Alex Pavel
- · Replies 19 ·
High School Black Hole Firewalls: Explaining to John K Clark
- johnkclark
- · Replies 13 ·
High School Why Light Experienced a Doppler Shift?
- Mohammad Fajar
- · Replies 60 ·
High School Black Holes: Rotating vs Non-Rotating
- Souhardya Nandi
- · Replies 4 ·
Undergrad Can Spacetime Be Visualized in a 2D Universe Like Flatland?
- Gabriele99
- · Replies 2 ·
Undergrad Alcubierre Drive & Bending of Spacetime
- jsk108
- · Replies 2 ·
High School Gravity Production: Electrons, Atoms & Magnetic Fields
- Connor Austin
- · Replies 3 ·
High School Common Time: Explaining Einstein's Definition
- WilliamMGiraldo
- · Replies 8 ·
Undergrad Derivative of Lorentz factor and four-acceleration
- Frank Castle
- · Replies 14 ·
Undergrad Negative Mass and Hawking Radiation
- fox26
- · Replies 6 ·
Undergrad Understanding Time Dilation and Velocity: Debunking Common Misconceptions
- Mohammed Ayaz Quadri
- · Replies 30 ·
High School Geodesic equation in Minkowski space clarification
- sqljunkey
- · Replies 1 ·
High School Can FTL Travel be Achieved With Mass of a Photon?
- Lunct
- · Replies 13 ·
High School I understand time a little better
- paulo84
- · Replies 38 ·
Undergrad Can Wormholes Be Stabilized Using Negative Energy Density?
- Christofer Br
- · Replies 6 ·
High School Solving Special Relativity Equation: Rail Car Thought Experiment
- Alex Pavel
- · Replies 3 ·
Graduate Black Hole Orbit Inequality: Explained
- quasarLie
- · Replies 2 ·
Graduate GR to Naive Physics: Is it Possible?
- Simon Bridge
- · Replies 1 ·
Undergrad Twin Paradox & Bondi K-Calculus: Who's Younger?
- Mohammad Fajar
- · Replies 5 ·
High School Why do clocks experience time dilation in special and general relativity?
- Galactic explosion
- · Replies 31 ·
Undergrad Measuring Light Speed Anisotropy
- Paul Colby
- · Replies 11 ·
Undergrad Does a metric exist for this surface?
- DAirey
- · Replies 14 ·
High School A is slower than B, B is slower than A. Where did it go?
- Bartolomeo
- · Replies 7 ·
High School Is Special Relativity Universally Accepted?
- Jimmy87
- · Replies 46 ·
Undergrad Why isn't the Roemer type experiment a one way measure of c?
- Alfredo Tifi
- · Replies 56 ·
Undergrad Gravitational Waves vs Universe Expansion Rate
- skanskan
- · Replies 4 ·
Undergrad Confusion about Frame Dragging
- tzimie
- · Replies 34 ·
Undergrad Einstein's Elevator & Tidal Gravity
- Wes Tausend
- · Replies 5 ·
Insights The Schwarzschild Metric: Part 3, A Newtonian Comparison - Comments
- RUTA
- · Replies 2 ·
Insights The Schwarzschild Metric: Part 2, The Photon Sphere - Comments
- RUTA
- · Replies 2 ·
Undergrad Einstein's Pursuit of Unified Theory: Motivation and Observations
- Npac123
- · Replies 5 ·
High School Is the Double-Slit Experiment Validating Special Relativity's Influence on Time?
- Marcus de Brun
- · Replies 11 ·
Undergrad Alice Observes Bob at Event Horizon: DarkLink's Question
- Felix Fowler
- · Replies 13 ·
High School Light Propagation: Doubts Answered Here
- GAURAV DADWAL
- · Replies 48 ·
Undergrad Explaining Relativity within 3 minutes
- Tio Barnabe
- · Replies 14 ·
High School Young Student Wins $250K Explaining Relativity
- jedishrfu
- · Replies 2 ·
Undergrad Why Does ds^2 Equal 0 in Metrics?
- Arman777
- · Replies 10 ·
High School Is the association of QG with BH a fake
- ftr
- · Replies 15 ·
High School Understanding the Flow of Time: Relativity and Perception Explained
- Delta2
- · Replies 8 ·
High School Order of events and cause and effect
- joneall
- · Replies 26 ·
Graduate Kerr-Bolt Spacetime: Derivation & Resources
- Sumarna
- · Replies 2 ·
Graduate Divergence of (covaraint) energymomentum tensor
- Torg
- · Replies 43 ·
Insights The Schwarzschild Metric: Part 1, GPS Satellites - Comments
- RUTA
- · Replies 4 ·
Undergrad Does the "space twin" benefit from length contraction?
- Peter Martin
- · Replies 136 ·
Undergrad Embedding Curved Spacetime in Noncurved Spacetime
- exponent137
- · Replies 1 ·
High School How To Consistently Explain Electromagnetism With Relativity
- Geocentricist
- · Replies 161 ·
High School Can We Really Stop Gravity by Altering Spacetime?
- Odette
- · Replies 5 ·
Undergrad What is the true nature of distance in the context of space and time?
- BobTheFrog
- · Replies 2 ·
Graduate Why is all the mass of a BH in the singularity?
- alex4lp
- · Replies 11 ·
Undergrad Velocity Relativity: Solving a Complex Problem
- PhysicallyAmazing
- · Replies 6 ·
Undergrad Measuring Speed in Relativity - Einstein's Work Explained
- erik giles
- · Replies 17 ·
Undergrad Atomic Oscillations & Redshift in Sun and Earth
- Mickey1
- · Replies 3 ·
Undergrad General Relativity & Quantum Theory: Where's the Limit?
- Giuliano97
- · Replies 3 ·
High School Why is the general theory of relativity is so complicated
- mr1batman
- · Replies 32 ·